The chat uses a simple text protocol over TCP.
The protocol consists of utf-8 messages, separated by
The client connects to the server and sends login as a first line. After that, the client can send messages to other clients using the following syntax:
login1, login2, ... loginN: message
Each of the specified clients then receives a
from login: message message.
A possible session might look like this
On Alice's computer: | On Bob's computer: > alice | > bob > bob: hello < from alice: hello | > alice, bob: hi! < from bob: hi! < from bob: hi! |
The main challenge for the chat server is keeping track of many concurrent connections. The main challenge for the chat client is managing concurrent outgoing messages, incoming messages and user's typing.
Let's create a new Cargo project:
$ cargo new a-chat $ cd a-chat
Add the following lines to
[dependencies] futures = "0.3.0" async-std = "1"